From: Roman Kagan <rkagan@virtuozzo.com>
To: "Suthikulpanit, Suravee" <Suravee.Suthikulpanit@amd.com>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"pbonzini@redhat.com" <pbonzini@redhat.com>,
"rkrcmar@redhat.com" <rkrcmar@redhat.com>,
"joro@8bytes.org" <joro@8bytes.org>,
"vkuznets@redhat.com" <vkuznets@redhat.com>,
"graf@amazon.com" <graf@amazon.com>,
"jschoenh@amazon.de" <jschoenh@amazon.de>,
"karahmed@amazon.de" <karahmed@amazon.de>,
"rimasluk@amazon.com" <rimasluk@amazon.com>,
"Grimm, Jon" <Jon.Grimm@amd.com>
Subject: Re: [PATCH v4 07/17] svm: Add support for setup/destroy virutal APIC backing page for AVIC
Date: Mon, 4 Nov 2019 21:53:51 +0000 [thread overview]
Message-ID: <20191104215348.GA23545@rkaganb.lan> (raw)
In-Reply-To: <1572648072-84536-8-git-send-email-suravee.suthikulpanit@amd.com>
On Fri, Nov 01, 2019 at 10:41:30PM +0000, Suthikulpanit, Suravee wrote:
> Re-factor avic_init_access_page() to avic_update_access_page() since
> activate/deactivate AVIC requires setting/unsetting the memory region used
> for virtual APIC backing page (APIC_ACCESS_PAGE_PRIVATE_MEMSLOT).
AFAICT the patch actually touches the (de)allocation of the APIC access
page rather than the APIC backing page (or I'm confused in the
nomenclature).
Thanks,
Roman.
> Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
> ---
> arch/x86/kvm/svm.c | 11 +++++------
> 1 file changed, 5 insertions(+), 6 deletions(-)
>
> diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
> index b7d0adc..46842a2 100644
> --- a/arch/x86/kvm/svm.c
> +++ b/arch/x86/kvm/svm.c
> @@ -1668,23 +1668,22 @@ static u64 *avic_get_physical_id_entry(struct kvm_vcpu *vcpu,
> * field of the VMCB. Therefore, we set up the
> * APIC_ACCESS_PAGE_PRIVATE_MEMSLOT (4KB) here.
> */
> -static int avic_init_access_page(struct kvm_vcpu *vcpu)
> +static int avic_update_access_page(struct kvm *kvm, bool activate)
> {
> - struct kvm *kvm = vcpu->kvm;
> int ret = 0;
>
> mutex_lock(&kvm->slots_lock);
> - if (kvm->arch.apic_access_page_done)
> + if (kvm->arch.apic_access_page_done == activate)
> goto out;
>
> ret = __x86_set_memory_region(kvm,
> APIC_ACCESS_PAGE_PRIVATE_MEMSLOT,
> APIC_DEFAULT_PHYS_BASE,
> - PAGE_SIZE);
> + activate ? PAGE_SIZE : 0);
> if (ret)
> goto out;
>
> - kvm->arch.apic_access_page_done = true;
> + kvm->arch.apic_access_page_done = activate;
> out:
> mutex_unlock(&kvm->slots_lock);
> return ret;
> @@ -1697,7 +1696,7 @@ static int avic_init_backing_page(struct kvm_vcpu *vcpu)
> int id = vcpu->vcpu_id;
> struct vcpu_svm *svm = to_svm(vcpu);
>
> - ret = avic_init_access_page(vcpu);
> + ret = avic_update_access_page(vcpu->kvm, true);
> if (ret)
> return ret;
>
> --
> 1.8.3.1
>
next prev parent reply other threads:[~2019-11-04 21:54 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-01 22:41 [PATCH v4 00/17] kvm: x86: Support AMD SVM AVIC w/ in-kernel irqchip mode Suthikulpanit, Suravee
2019-11-01 22:41 ` [PATCH v4 01/17] kvm: x86: Modify kvm_x86_ops.get_enable_apicv() to use struct kvm parameter Suthikulpanit, Suravee
2019-11-01 22:41 ` [PATCH v4 02/17] kvm: lapic: Introduce APICv update helper function Suthikulpanit, Suravee
2019-11-01 22:41 ` [PATCH v4 03/17] kvm: x86: Introduce APICv deactivate bits Suthikulpanit, Suravee
2019-11-02 9:51 ` Paolo Bonzini
2019-11-01 22:41 ` [PATCH v4 04/17] kvm: x86: Add support for activate/de-activate APICv at runtime Suthikulpanit, Suravee
2019-11-02 9:52 ` Paolo Bonzini
2019-11-04 19:22 ` Suthikulpanit, Suravee
2019-11-01 22:41 ` [PATCH v4 05/17] kvm: x86: Add APICv activate/deactivate request trace points Suthikulpanit, Suravee
2019-11-01 22:41 ` [PATCH v4 06/17] kvm: x86: svm: Add support to activate/deactivate posted interrupts Suthikulpanit, Suravee
2019-11-01 22:41 ` [PATCH v4 07/17] svm: Add support for setup/destroy virutal APIC backing page for AVIC Suthikulpanit, Suravee
2019-11-04 21:53 ` Roman Kagan [this message]
2019-11-12 0:05 ` Suravee Suthikulpanit
2019-11-01 22:41 ` [PATCH v4 08/17] kvm: x86: Introduce APICv pre-update hook Suthikulpanit, Suravee
2019-11-04 22:05 ` Roman Kagan
2019-11-12 0:08 ` Suravee Suthikulpanit
2019-11-12 11:12 ` Roman Kagan
2019-11-01 22:41 ` [PATCH v4 09/17] svm: Add support for activate/deactivate AVIC at runtime Suthikulpanit, Suravee
2019-11-01 22:41 ` [PATCH v4 10/17] kvm: x86: hyperv: Use APICv update request interface Suthikulpanit, Suravee
2019-11-01 22:41 ` [PATCH v4 11/17] svm: Deactivate AVIC when launching guest with nested SVM support Suthikulpanit, Suravee
2019-11-01 22:41 ` [PATCH v4 12/17] svm: Temporary deactivate AVIC during ExtINT handling Suthikulpanit, Suravee
2019-11-02 10:01 ` Paolo Bonzini
2019-11-01 22:41 ` [PATCH v4 13/17] kvm: i8254: Deactivate APICv when using in-kernel PIT re-injection mode Suthikulpanit, Suravee
2019-11-02 9:57 ` Paolo Bonzini
2019-11-04 18:54 ` Suthikulpanit, Suravee
2019-11-04 21:49 ` Paolo Bonzini
2019-11-05 7:05 ` Graf (AWS), Alexander
2019-11-05 8:40 ` Roman Kagan
2019-11-04 23:17 ` Roman Kagan
2019-11-05 22:47 ` Paolo Bonzini
2019-11-11 17:37 ` Suravee Suthikulpanit
2019-11-12 12:22 ` Roman Kagan
2019-11-01 22:41 ` [PATCH v4 14/17] kvm: lapic: Clean up APIC predefined macros Suthikulpanit, Suravee
2019-11-01 22:41 ` [PATCH v4 15/17] kvm: ioapic: Refactor kvm_ioapic_update_eoi() Suthikulpanit, Suravee
2019-11-01 22:41 ` [PATCH v4 16/17] kvm: ioapic: Lazy update IOAPIC EOI Suthikulpanit, Suravee
2019-11-01 22:41 ` [PATCH v4 17/17] svm: Allow AVIC with in-kernel irqchip mode Suthikulpanit, Suravee
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